“最后期限”仅剩四天，试图寻求谈判突破，美安排高官分别访俄乌

Group 1 - The U.S. Middle East envoy, Wittekov, is expected to visit Moscow this weekend, with hopes for breakthroughs in negotiations regarding the Russia-Ukraine conflict [1][2] - Trump's recent sanctions and tariffs on Russia are described as "devastating," aiming to cut off Russia's ability to fund the war [1] - The visit coincides with the approaching deadline set by Trump for a potential agreement between Russia and Ukraine, which is August 8 [1][3] Group 2 - Russian President Putin emphasizes the necessity of dialogue to resolve the Ukraine crisis, stating that all disappointment stems from overly high expectations [2][3] - The effectiveness of U.S. sanctions and tariffs is questioned, as trade partners like Brazil refuse to comply without UN Security Council authorization [3] - Ukraine's military is under significant pressure from Russian forces, with recent advances reported, indicating a deteriorating situation for Ukraine [4]